I'm still ticked off at the (apparent) Warehouse 13 kill-off. Not because I'm worried he won't be in work, but because he was already defining the Valda character and it had so much potential. And it was easy to to find on TV or internet.
Where do I go to see legit Dr. Who (US Left Coast, minimal TV) or do I just have to wait for DVDs?
Ennyhoo, break a leg, Mr. Sheppard!!

Interesting. He must have already known he was up for the part last weekend during his con appearance. I have a write up of it here where he says that Dr. Who is a show he's always wanted to appear on. He also mentions that Ben Edlund is one of his favorite writers.

Yay! I just finished watching the latest episode of Supernatural, which he was in. It will be great to see him in Doctor Who because I'm a huge Doctor Who geek. (Which completely reminds me that I need to go scouting for second Doctor episodes because they are the only ones I haven't seen yet).

TamaraC, the Christmas special has been wrapped for a while now. They've been in production for the next series for a few weeks (I believe they've filmed the first block, including Neil Gaimans episode.) He was probably in Cardiff for the readthrough/rehersals.

Thanks, guys. I was just wildly guessing. I also think it is adorable how Natalie Morales (of Middleman and White Collar) is campaigning on twitter to be cast in Doctor Who. She mentioned Manservant Neville (Mark's character on Middleman) being cast and wants to know when she gets a call. :)

Guess that I shouldn't be too surprised. In the last week or two I've seen Mark in more individual television episodes than any other actor, I would imagine. This week's Supernatural. The final two episodes of Leverage season two. The Season finale of Warehouse 13. It's like the guy never stops working. How is it possible that he has yet to be given a lead role in a genre show?

Looking forward to seeing him in Doctor Who. Whoever it is he plays, I hope it's a recurring role. Always good to see him pop up.

You're probably right, Saje. I'd find it hard to believe that no one has every considered writing a more regular role for Mark into one of their shows. I suppose it's very possible that he just prefers not to be tied down. It's not as if he ever has to worry about where the next job is going to be coming from! ;)

He was more a recurring character on that, only appearing in two episodes IIRC (he may have been intended to become a regular, hard to tell with the show only lasting 8 eps). Since 2000 'Leverage' is - narrowly - the single show he's worked on most in fact (7 eps).

Mark is amazing in Supernatural! I was excited when I heard he was coming back. His portrayal of Crowley is scene-stealing; you forget there’s someone else in the scene. I wish they’d just play him against Misha’s Castiel (especially given Crowley's new job) - I’m wondering if my senses will explode of the awesomeness.